I didn't have a good experience with Heatable. - The engineer was late, and didn't communicate until after the agreed arrival window had passed - The engineer was messy and careless. They left mortar sprayed over the walls and ceiling; were going to leave holes in the external wall until I asked them to fill them; stood on parts of the boiler during installation; did not install the products I had ordered and paid for; installed the thermostat receiver in a place where it wouldn't have worked; let a stranger into my home while I was out for half an hour, and allowed them to wait in my living room until I got back (someone who was looking for a room to rent); and finally asked if they could sign the completion documents on my behalf because their phone had run out of battery. - To their credit, Heatable did agree to refund the products which hadn't been installed and sent another engineer to replace the damaged cover and 'audit' the installation. This engineer told me the boiler should work OK but it had been installed messily with poor soldering. - At no point in a 20-minute conversation did Heatable offer an apology, until I suggested it might be appropriate. Even then, the aftersales agent was quite stroppy when I described the experience as an example of poor service, bizarrely maintaining they had provided a good service. I was attracted to Heatable by the offer of spreading the cost over time. I now wish I had found a local engineer and paid up front.